题型:填空题 对于下列反应类型的判断,不正确的是( )A.CO2+H2O=H2CO3化合反应B.2H2O2=O2↑+2H2O分解反应C.3CO+Fe2O3=2Fe+3CO2置换反应D.NaHCO3+NaOH=Na2CO3+H2O复分解反应 查看答案
题型:填空题 —Today I can't go with you. There will be an English test tomorrow. —_______. Maybe next time.[ ]A. It doesn't matter. B. My pleasure.C. I don't think so D. Sorry to hear that. 查看答案
题型:填空题 规范操作,提高业务能力,要求收费员单车平均操作时间入口不高于()秒,出口不高于()秒。正常情况下,收费站进出口车道平均排队车辆不超过()辆(车道开足除外),特殊情况下不出现出口车道车辆排队到主线的情况。()请按顺序排列填写A.7秒B.5秒C.25秒D.7辆E.5辆 查看答案